JP5813890B2 - Adhesive composition and use thereof - Google Patents

Description

  The present invention relates to a novel formulation for an adhesive composition and also an adhesive composition, in particular for a hybrid adhesive, comprising at least one mixture of an amino resin and at least one polyether, and It relates to the combination of this mixture with an isocyanate and also to the use of polyethers in amino resin adhesives. These adhesive compositions are particularly suitable for use as adhesives for wood based materials, in particular OSB boards, fiber boards or chip boards. In a further aspect, the present invention provides such a woody material from a lignocellulosic ground material, wherein the woody material is obtained by bringing the lignocellulosic ground material into contact with the adhesive composition of the present invention and then pressing with heat treatment. More particularly, the present invention relates to a method for manufacturing an OSB board, a wood fiber board or a chip board. Finally, the present invention is directed to a wood-based material that can be obtained thereby.

Conventional technology

  For bonding wood-based materials, mainly three different adhesives have been used for many years. These are amino resin adhesives such as urea-formaldehyde adhesives; phenol-formaldehyde adhesives; and diisocyanate adhesives. Urea resins according to DIN 7728 are aminoplasts that can be prepared as condensation products from urea and / or urea derivatives and aldehydes, in particular formaldehyde, and may usually be heat-cured. These urea resins, also called UF resins, are used both as dry powder adhesives and in liquid form.

  Due to its low cost, urea resins have found wide application in the field of wood-based material production. Furthermore, the urea resin exhibits good dry bonding strength. Urea resins, such as urea-formaldehyde resins, also apply to phenol-formaldehyde resins, but can be reinforced with melamine resins to improve mechanical properties and / or water resistance.

  The urea resin forms a part of the thermosetting resin group, and the thermosetting resin is cured through a polycondensation reaction. Their reactions are rapid but result in very hard and brittle polymers. Furthermore, the water solubility of these two adhesives is not necessarily particularly good, so that these adhesives need to be used in a concentration range of 50% to 70% by weight in terms of solids content. . However, these qualities, for example when applied to wood, are negative with respect to adhesive distribution and wetting of the material to be bonded. In other words, typically the adhesive distribution achieved by, for example, spray application improves in proportion to the degree to which the adhesive used is diluted. Urea resins certainly provide the most desirable solution from a cost standpoint in the production of wood based materials, but the results they produce are inferior in terms of bond quality compared to the results produced by other adhesives. Furthermore, with regard to their reactivity, for example, their adhesives are less susceptible to action than other adhesives, such as isocyanate adhesives.

  For example, in order to overcome the disadvantageous qualities of urea resins described above, combining urea adhesives with other non-urea resin adhesives, phenolic resin adhesives or melamine resin adhesives can prevent non-adhesion between individual adhesives. Compatibility problems or mixing problems frequently occur. Correspondingly, a mixture of adhesive components cannot be easily produced. On the contrary, phase separation can occur, which leads to inhomogeneities in the binding region. Furthermore, binding properties such as reaction rate, structure and morphology can be very different. Various improvements have been proposed to overcome this problem.

  The use of surfactants is intended to improve miscibility. The modification of the amino resin or in particular the isocyanate is intended to improve the compatibility. Certain mixing techniques are intended to allow improved mixing of each component. However, all these proposals have shown both technical and economic disadvantages. For example, WO 02/22332 describes a hybrid resin of a phenol-formaldehyde resin and an isocyanate resin in which the phenol-formaldehyde resin is protected for the purpose of improving stability. US Pat. No. 6,465,104 B1 describes hot melt adhesives using modified polyurethanes which substantially comprise polycarboxylic acid esters, polyols and polyisocyanates. Each of these components is mixed as a solid.

  The urea resin described above finds use as an adhesive, particularly in the fiberboard field. However, the use of such fiberboards with urea-based adhesives is unlikely even in high humidity areas or when exposed directly to water. This is because these adhesives are not resistant to hydrolysis.

  Accordingly, there is a need for new adhesive compositions that overcome the above-mentioned disadvantages. Accordingly, it is intended to provide a urea-based adhesive that has a higher stability to exposure to moisture and allows for improved reaction with other adhesives. Furthermore, the adhesive needs to exhibit higher elasticity and reduced brittleness. Chemical stability is preferably increased, and in addition, reduced emission of formaldehyde and other volatile or highly volatile organic compounds is achieved.

  Correspondingly, the present invention is based on the object of providing such an adhesive. A further aspect is the use of these adhesives in the production of the corresponding wood based material and the wood based material itself. The present invention relates to the use of polyethers to improve the miscibility of amino resins with other adhesives, and the adhesives containing amino resins, in particular the adhesives containing urea, which mix the polyethers with the amino resins. The manufacturing method is further provided. The present application is finally directed to a novel method of using an adhesive.

Description of the invention

  The object of the present invention comprises a novel formulation for an adhesive composition and a first component formed from at least one amino resin, such as a urea resin, and at least one polyether, This is achieved through the provision of an adhesive composition particularly suitable for hybrid adhesives.

  The expression “amino resin” refers to the condensation product of an aldehyde, in particular formaldehyde, with a compound containing an amino group, in particular urea, melamine, benzoguanamine, glycoluril, acetoguanamine, biuret and mixtures thereof.

  The expression “urea resin” is understood here to refer to the condensation product of urea and / or a urea derivative and an aldehyde, in particular formaldehyde, which may be chemically and / or thermally cured. Urea resins, also referred to as UF resins, are further components such as melamine to form melamine-urea-formaldehyde resins, and / or phenol to form urea-phenol-formaldehyde resins, and / or melamine-urea- They may additionally have a mixture thereof to form a phenol-formaldehyde resin.

  The expression “polyether” is understood here to refer to a compound having at least one ethylene oxide unit or propylene oxide unit and at least one isocyanate reactive group, which is hydroxyl, amino, epoxy and Selected from the group including thiols, preferably hydroxyl.

  The expression “isocyanate” is understood here to refer to monomeric, dimeric, oligomeric and polymeric isocyanates, unless otherwise specified.

  The polyether used here may be a mixture of different alkoxylated polyols. Preferred polyols include those having polymerized propylene oxide units and / or polymerized ethylene oxide units therein. These units may be randomly distributed in these chains and / or ends in the form of polyethylene oxide blocks.

The expression “polyether” comprises at least one ethylene oxide unit or propylene oxide unit. It relates to units of the formula (—CH ₂ —CH ₂ —O—, ie ethylene oxide, and / or —CH ₂ —CH ₂ —CH ₂ —O—, ie propylene oxide). The polyether used according to the invention is preferably a polyol.

  The expression “polyol” refers herein to a compound containing two or more hydroxyl groups (OH). The polyol may be called a polyhydric alcohol. Polyols may exist in both linear and cyclic forms. Polyols are in particular alcohols representing oligomers or polymers of short-chain alcohols, such as polyalkylene glycols or glycerol oligomers.

  The expression “hybrid adhesive” refers to an adhesive or resin composed of at least two components.

  The expressions “encompass” or “encompassing” and “comprise” or “comprising” are used interchangeably herein and should be understood as an open description. And does not exclude the presence of additional components. It is clear that these expressions encompass the aspects of the exclusive expression “consist” or “consisting”.

  In certain preferred embodiments, the adhesive composition of the present invention is a composition wherein the polyol is a polyalkylene glycol, a glycerol oligomer or an oligo or polysaccharide.

In a particularly preferred embodiment, the polyether in the adhesive composition of the present invention has the general formula (I):
R ₃ O — [(CHR ₁ ) _X —O] _n —R ₂
Wherein R ₁ is independently selected at each occurrence from H, OH, OR ₄ or C (O) —R ₅ ;
R ₄ is independently selected at each occurrence from hydrogen or a C ₁ -C ₆ alkyl group;
R ₅ is independently selected at each occurrence from hydrogen, OH, OR ₄ or N (R ₄ ) ₂ ;
R ₂ and R ₃ are, independently of one another, selected from hydrogen or a hydrocarbon that may contain heteroatoms;
x is an integer from 1 to 10 independently at each occurrence;
n is an integer of 1-30, preferably an integer of 1-20)
Polyol.

  The polyol has at least two hydroxyl groups, for example at least three hydroxyl groups.

  For example, the polyol is particularly preferably polyethylene glycol or polypropylene glycol having an average molecular weight of 62 to 2000 g / mol, and preferably having an average molecular weight of 100 to 800 g / mol.

  In other words, it is particularly preferred that the polyol component constitutes a short-chain polydiol or triol, such as ethylene glycol, propylene glycol, butylene glycol or oligomers or polyols thereof. It further comprises the corresponding oligomer or polymer of a mixture of these components. These components may be present alone or as a mixture.

  Examples of the types of polyethers that may be used in accordance with the present invention preferably include those obtained by polymerization of ethylene oxide, which includes starting with ethylene oxide, for example, with other cyclic oxides, propylene oxide. Also included are products obtained by copolymerization in the presence of compounds, preferably in the presence of at least one or more multifunctional starting compounds. Suitable starting compounds contain a large number of active hydrogen atoms, water, and low molecular weight polyethylenes such as ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, cyclohexanedimethanol, resorcinol, bisphenol A, glycerol, trimethylolpropane, 1,2,6-hexanetriol, pentaerythritol and the like are included. Mixtures of these and the corresponding cyclic oxides can also be used.

  Surprisingly, it has been found that polyethers improve the miscibility of amino resins, such as urea resins, with other adhesives. This means that when an amino resin, such as a urea resin, is mixed with another adhesive, such as an isocyanate-based adhesive, if it is mixed with a polyol in advance, the miscibility with a further adhesive can be improved. It means that.

  The amino resin is preferably selected from urea resins, in particular urea-formaldehyde resins, melamine-urea-formaldehyde resins, melamine-urea-phenol-formaldehyde resins or mixtures thereof.

  The amount of polyether, in particular polyol, is preferably 0.1-20% by weight, for example 0.1-15% by weight, for example 0.5-10% by weight, for example 2-8, based on the amount of amino resin. % By weight, for example at most 9, 8, 7, 6, 5 or 4% by weight and at least 0.5, 1, 2 or 3% by weight.

  In certain embodiments, the polyether may be present in an amount of at least 0.01% by weight, based on 100% by weight of the adhesive composition including the first and second components. Preferably, the polyether is present in an amount of at least 0.05, for example 0.1% by weight, preferably 0.3% by weight, for example preferably 0.5% by weight, based on 100% by weight of the composition.

  Due to the presence of polyethers, such as polyols, in amino resins, particularly urea resins, it is possible to mix amino resins with other adhesives, such as isocyanates and epoxy resins, among others, in order to obtain hybrid adhesives, Optionally, a phenol resin, a melamine resin, a polyurethane resin, a protein-phenol adhesive, polyacrylate, a polymerized acrylic acid-based formaldehyde-free adhesive, and other aqueous adhesive systems can be mixed.

  The second adhesive here is preferably at least one epoxy compound or an isocyanate selected from the group comprising isocyanates, in particular aliphatic and aromatic isocyanates.

  In other words, according to the present invention, the adhesive composition or formulation for the adhesive composition includes an isocyanate as the second component. In some embodiments, the isocyanate includes at least one polycyanate compound.

  Examples of suitable polyisocyanates that may be used according to the present invention are organic polyisocyanate compounds or mixtures of organic polyisocyanate compounds, preferably these compounds have at least two isocyanate groups. Examples of organic polyisocyanate compounds include diisocyanates, especially aromatic diisocyanates, and isocyanates with high functionality. Examples of these are aliphatic isocyanates such as hexamethylene diisocyanate, and aromatic diisocyanates such as diphenylmethane diisocyanate (MDI) in the form of 2,4 ′, 2,2 ′ and 4,4 ′ isomers and mixtures thereof. (Also referred to as pure MDI), a mixture of diphenylmethane diisocyanate (MDI) and its oligomer (referred to as polymeric MDI), m- and p-phenylene diisocyanate, tolylene-2,4- and tolylene-2,6-diisocyanate (toluene diisocyanate TDI) Also known as 2,4-TDI and 2,6-TDI, chlorophenylene-2,4-diisocyanate, naphthalene-1,5-diisocyanate, diphene in suitable isomer mixtures. Further examples include len-4,4′-diisocyanate, 4,4′-diisocyanate-3,3′-dimethylbiphenyl, 3-methyldiphenylmethane-4,4′-diisocyanate and diphenylethadiisocyanate, and cycloaliphatic diisocyanates. For example, cyclohexane-2,4- and 2,3-diisocyanate, 1-methylcyclohexyl-2,4- and 2,6-diisocyanate, and mixtures thereof, and bis-isocyanatocyclohexyl) methane (eg, 4,4 '-Diisocyanatodicyclohexylmethane (H12MDI), triisocyanates such as 2,4,6-triisocyanatotoluene and 2,4,4-triisocyanatodiphenyl ether, isophorone diisocyanate (IPD) ), Butylene diisocyanate, trimethylhexamethylene diisocyanate, isocyanatomethyl-1,8-octane diisocyanate, tetramethyl xylene diisocyanate (DMXDI), 1,4- cyclohexane diisocyanate (CDI) and tolidine diisocyanate (TODI) can also be mentioned.

  Modified polyisocyanates containing isocyanurates, carbodiimides or uretonimine groups may be used as well. Furthermore, with block polyisocyanates, for example reaction products of phenol or oxime in polyisocyanates, preferably with block polyisocyanates whose deblocking temperature is below the temperature used when the polyisocyanate composition is utilized. May be. Mixtures of isocyanates can also be used.

  In some embodiments, the isocyanate may be an emulsifiable polyisocyanate. Suitable emulsifiable isocyanates may be, for example, the emulsifiable MDI disclosed in EP18061, EP516361, GB1523601, GB1444933 or GB2018796. Suitable emulsifiable polyisocyanates are commercially available in particular from Huntsman under the trademark Suprasec, for example Suprasec 1042, Suprasec 2405, Suprasec 2408 and Suprasec 2419 from Huntsman (USA).

  Preferred representative aliphatic isocyanates are, for example, hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI) and 1,4-cyclohexyl diisocyanate (CHDI). Preferred aromatic polyisocyanates include polymeric diphenylmethane diisocyanate (PMDI), tolylene diisocyanate (TDI) and diphenylmethane diisocyanate (MDI). Particularly preferably, the second adhesive present in the adhesive composition according to the invention is a diisocyanate-based, in particular PMDI-based adhesive.

  The amount of isocyanate relative to the urea resin is preferably in the range of 0.5% to 40% by weight. Particularly preferred is an amount in the range of 10-30% by weight, for example 15-25% by weight, in particular 20% by weight, based on the amount of urea resin.

  In certain embodiments, the at least one isocyanate is in an amount of at least 0.5% by weight, for example 100% by weight of the total formulation, such as at least 10% by weight, based on the total amount of the formulation or adhesive composition, for example It may be present in an amount of at least 15% by weight. The at least one isocyanate may be present, for example, in an amount of 0.5 to 60% by weight, for example 5 to 40% by weight, for example 10 to 30% by weight, based on 100% by weight of the total formulation.

  In certain embodiments, the formulation or hybrid adhesive composition consists of a mixed component comprising an amino resin as defined above and a polyether as defined above and a further component comprising an isocyanate as defined above.

  The adhesive composition according to the invention is in this case prepared in such a way that the polyether is first mixed with the amino resin and subsequently further possible components are added before the composition is subsequently used as an adhesive composition. May be present. According to the present invention, the adhesive composition is preferably in the form of a hybrid adhesive composition in the form of at least two separate components, or a blend of two components. In this case, one component has an amino resin and a polyether mixed together, and at least the second component has a further adhesive, for example an isocyanate adhesive. It is particularly preferred that the polyether is first mixed with an amino resin when the adhesive composition is produced. Subsequently, further adhesives such as isocyanate adhesives may be mixed. Further adhesive mixing is preferably performed immediately prior to curing to prevent the second adhesive, eg, isocyanate, from reacting with the polyether. In other words, this operation is preferably performed as late as possible to avoid premature curing.

  Thus, in certain preferred embodiments, the mixture of amino resin and polyether is first applied separately or preferably as a mixture, and the second component with isocyanate is applied just prior to curing of the adhesive. .

  In certain embodiments, the inventive formulation or the inventive adhesive composition may comprise at least one additional additive. These additives may be of the type selected from the group of curing agents, surfactants, waxes or pigments. Accordingly, suitable adjuvants are known to those skilled in the art. Those skilled in the art also understand the appropriate amount of these adjuvants added to the overall formulation.

  It has been found that a mixture of polyether and amino resin allows further adhesive mixing with little or no phase formation in the mixture.

  In certain embodiments according to the invention, the constituents here are present at least partly, for example completely, for example in liquid form. Mixing the constituents comprising the amino resin and the polyether with further constituents, for example isocyanate constituents, in certain embodiments is performed in a state where these constituents are in liquid form, for example at room temperature.

  Surprisingly, it was further observed that the cure was much faster compared to the adhesive composition without the polyether fraction. Thus, for example, in the case of a mixture of an isocyanate and a urea resin, the curing was slow, whereas it was found that the curing was very rapid when the polyether, eg, polyol, fraction according to the present invention was added. .

  The properties of this polyether found are not predictable and should therefore be considered surprising. The use of the hybrid adhesive composition of the present invention allows for the production of wood based materials with improved properties. In particular, the use of the adhesive of the present invention in the production of wood-based materials is advantageous over the adhesives that have been utilized to date. Based on the good wettability of woody materials and miscibility with other adhesives, the adhesives of the present invention exhibit advantages. These advantages include better miscibility with other adhesives and improved cure during manufacture, and thus improved bond quality. The adhesive of the present invention exhibits a good reaction between the constituent components. After curing, the adhesive is more stable to exposure to moisture. In addition, the adhesive exhibits higher elasticity and lower brittleness and improved chemical stability. Finally, the emission of formaldehyde and other volatile and highly volatile organic compounds can be reduced. The adhesive composition according to the invention is particularly suitable for the production of wood-based materials such as OSB (oriented strand board), fiberboard or chipboard.

In a further aspect, the present application is a method for producing a woody material, in particular OSB board, wood fiber board or chipboard, from lignocellulosic grounds, comprising the following production steps:
a) contacting the lignocellulosic ground product with the formulation and / or adhesive composition for the adhesive composition of the present invention, and b) pressing the mixture from a) with heat treatment. Target method.

  Here, the formulation for the adhesive composition or the constituents of the adhesive composition comprises an amino resin and a polyether as the first composition and optionally a different adhesive as the second composition, in particular Isocyanate and may be metered into the lignocellulosic grind in step a), i.e. in the process of contact with the lignocellulosic grind.

  You may perform this metering addition by a well-known method. The formulation or adhesive composition is preferably mixed by means of a blow line, a mixer or a coil. Alternatively, the adhesive composition of the present invention may be applied by spray or nozzle application as a complete mixture or in the form of each component. Those skilled in the art understand suitable methods.

  The composition of the present invention can be brought into contact with the lignocellulosic ground product by dry adhesion. The composition here is applied to the dried lignocellulosic pulverized product by very fine nozzle coating. Thermally concentrated drying operations are performed prior to bonding with the adhesive, so that the consumption of the adhesive is more pronounced than with blowline bonding, while generally having a homogeneous adhesive distribution. Very few.

  Further processing of the lignocellulosic grounds using the adhesive composition may be carried out according to known production methods for wood-based materials, for example wood-based material boards such as OSB, fiberboard and chipboard. Therefore, the strand or fiber can be dispersed while pre-pressing if desired, and then the mixture can be pressed while heat-treating. This hot pressing is performed under known conditions according to a known method.

  The lignocellulosic ground product is preferably selected from wood chips, wood strands and wood fibers.

  In this way, the woody material of the present invention can be produced. These wood based materials are in particular fiberboards such as HDF (high density fiberboard) and MDF (medium density fiberboard), and also OSB boards and chipboards.

  The woody material here is one that has been bonded using the adhesive composition of the present invention and / or can be obtained by the method of the present invention.

  In a further aspect, the present invention is directed to the use of polyethers to improve the miscibility of amino resins with other adhesives, particularly isocyanate-based or epoxy-based adhesives. The use of polyethers in such adhesive compositions that are mixtures containing amino resins with other adhesives shows improved miscibility of these amino resins with additional adhesives. In addition, improved cure properties and associated improved bond properties were observed.

  Use of a polyether modifies the miscibility of the amino resin during subsequent mixing with other adhesives, thereby curing when using an adhesive composition that includes the amino resin and additional adhesive The speed can be improved and the homogeneity of the bond can also be improved.

  Finally, the present invention provides a method for producing an adhesive composition comprising an amino resin adhesive. The method includes a first step of mixing an amino resin adhesive with a polyether as described herein. Subsequently, to obtain an adhesive composition with an amino adhesive, a polyether and at least a second adhesive, this mixture of amino resins from the polyether is mixed with at least the second adhesive. Here, the at least second adhesive is preferably an isocyanate adhesive.

  The present invention is illustrated below with actual examples, but the present invention is not limited to these examples.

[Example]
The urea resin was mixed with various amounts of polyol (polyol 200, average molecular weight 200 g / mol) and then the type of isocyanate adhesive used in the wood based material industry was added. These components were thoroughly mixed with one another. For comparison, an adhesive composition comprising a mixture of isocyanate and urea resin was prepared without the addition of polyol. As shown in Table 1 below, the addition of a small amount of polyol resulted in reduced phase formation in the mixture. As presented in FIG. 1, the tendency to form phases decreased significantly with increasing polyol content. FIG. 1 shows the sample corresponding to Table 1 after mixing.

Surprisingly, it could also be observed that the curing of the mixture was much faster in the presence of the polyol component.
Below, the claims at the beginning of the application are appended as embodiments.
[1] i) at least one amino resin that is a condensation product of an aldehyde with a compound from the group of urea, melamine, benzoguanamine, glycoluril, acetoguanamine, biuret or mixtures thereof;
ii) a component formed from at least one ethylene oxide unit or propylene oxide unit and at least one polyether comprising at least one isocyanate-reactive group selected from the group comprising hydroxyl, amino, epoxy and thiol. And the component is a formulation for a hybrid adhesive composition wherein i) and ii) are present as a mixture.
[2] The polyether is a polyol, in particular a polyalkylene glycol, a glycerol oligomer or an oligo or polysaccharide, and in particular, the polyol has the general formula (I):
R ₃ O — [(CHR ₁ ) _X —O] _n —R ₂ (I) wherein R ₁ is independently H, OH, OR ₄ or C (O) —R _{5 at} each occurrence. Selected from
R ₄ is independently selected at each occurrence from hydrogen or a C ₁ -C ₆ alkyl group;
R ₅ is independently selected at each occurrence from hydrogen, OH, OR ₄ or N (R ₄ ) ₂ ;
R ₂ and R ₃ are, independently of one another, selected from hydrogen or a hydrocarbon that may contain heteroatoms;
x is an integer from 1 to 10 independently at each occurrence;
n is an integer from 1 to 30, in particular, for the hybrid adhesive composition according to [1], wherein the polyol is polyethylene glycol or polypropylene glycol having an average molecular weight of 62 to 4000 Formulation.
[3] The amount of polyether ranges from 0.1 to 20% by weight, for example from 0.1 to 10% by weight, preferably from 1 to 10% by weight, based on the amino resin, [1] and [2 ] The formulation for the hybrid adhesive composition in any one of.
[4] The amino resin is a urea resin, in particular urea-formaldehyde resin, melamine-urea-formaldehyde resin, melamine-urea-phenol-formaldehyde resin, protein-phenol resin, polyacrylate, polymerized acrylate-based formaldehyde-free resin or A blend for a hybrid adhesive composition according to any of the preceding paragraphs, which is a mixture thereof.
[5] Formulation for a hybrid adhesive composition according to any of the preceding paragraphs, comprising at least one further component comprising an additional adhesive, in particular an isocyanate-based adhesive.
[6] A first component containing at least one amino resin mixed with at least one polyether according to any one of [1] to [4], and a second component which is an isocyanate-based adhesive The formulation for a hybrid adhesive composition according to [5], comprising constituent components.
[7] The at least one isocyanate is hexamethylene diisocyanate, m- and p-phenylene diisocyanate, tolylene-2,4- and tolylene-2,6-diisocyanate, 2,4 ′, 2,2 ′ and 4, 4 'isomer form of diphenylmethane diisocyanate and mixtures thereof, mixtures of diphenylmethane diisocyanate and oligomers thereof, chlorophenylene-2,4-diisocyanate, naphthylene-1,5-diisocyanate, diphenylene-4,4'-diisocyanate, 4 , 4′-diisocyanate-3,3′-dimethylphenyl, 3-methyldiphenylmethane-4,4′-diisocyanate, diphenyl ether diisocyanate, cyclohexane-2,4- and 2,3-diisocyanate, 1-methyl Lucyclohexyl-2,4- and 2,6-diisocyanate, bis (isocyanatocyclohexyl) methane, 2,4,6-triisocyanatotolucol, 2,4,4-triisocyanatodiphenyl ether, isophorone diisocyanate, [5] or selected from the group consisting of butylene diisocyanate, trimethylhexamethylene diisocyanate, isocyanatomethyl-1,8-octane diisocyanate, tetramethylxylene diisocyanate, 1,4-cyclohexane diisocyanate, toluene diisocyanate, and mixtures thereof. Formulation for the hybrid adhesive composition according to [6].
[8] The blend for a hybrid adhesive composition according to any one of the preceding items, wherein the amount of the amino resin is at least 30% by weight based on 100% by weight of the entire blend.
[9] Any one of [5] to [8], wherein the at least one isocyanate is present in an amount of at least 0.5% by weight, preferably at least 1% by weight, based on 100% by weight of the total formulation. Formulation for the described hybrid adhesive composition.
[10] Any of [1] to [9], which can be obtained by mixing the constituents described in [1] to [4] with the further constituents described in [5] or [7] A hybrid adhesive composition comprising the formulation of claim 1.
[11] Use of a formulation or hybrid adhesive composition according to any of the preceding paragraphs for the production of wood-based materials, in particular OSB boards, fiberboards or chipboards.
[12] Use of the polyether according to any one of [1] to [3] in a hybrid adhesive composition, which is an amino resin with another adhesive subsequently added to the hybrid adhesive composition Use to mix the polyether with an amino resin in the first step to improve the miscibility of the.
[13] A method for producing a wood-based material from a lignocellulosic pulverized product, in particular, an OSB board, a wood fiber board or a chip board,
a) contacting the lignocellulosic pulverized product with the formulation for the hybrid adhesive composition according to any one of [1] to [9] or the hybrid adhesive composition according to [10],
b) A method comprising pressing the mixture from a) with heat treatment.
[14] The blend or the hybrid adhesive composition comprising a mixture of an amino resin and a polyether as the first composition, and optionally a different adhesive as the second composition, in particular an isocyanate-based adhesive. The component of the product is metered into the lignocellulosic ground product in step a), in particular the hybrid adhesive composition is applied by means of a blow line, a mixer or a coil. The method according to [13].
[15] The hybrid adhesive composition according to [10] is included and / or can be obtained by the method according to any of [13] and 14, preferably, in the form of fiberboard, particularly HDF and MDF, Or a wood-based material in the form of an OSB board.
[16] comprising an amino resin that is a condensation product of an aldehyde with a compound from the group of urea, melamine, benzoguanamine, glycoluril, acetoguanamine, biuret or mixtures thereof, and a second adhesive, particularly an isocyanate A method for producing a hybrid adhesive composition, wherein the amino resin is mixed with the polyether according to any one of [1] to [3], and the resulting amino resin / polyether mixture is A method comprising the step of subsequent mixing with a second adhesive.
[17] In the first step, the amino resin according to [1] is mixed with the polyether according to any one of [1] to [3], and then the amino resin and the polyether are mixed. The method according to [16], wherein the hybrid adhesive composition is produced from the mixture comprising the amino resin and the polyether and the isocyanate, wherein the mixture is mixed with the isocyanate according to any one of [5] and 7.

The sample corresponding to Table 1 is shown after mixing.

Claims (25)

i) at least one amino resin that is a condensation product of an aldehyde with a compound from the group of urea, melamine, benzoguanamine, glycoluril, acetoguanamine, biuret or mixtures thereof;
ii) formed from at least one polyol contains one isocyanate-reactive groups even without least in at least one of ethylene oxide units or propylene oxide units list, i) and ii) and the components present as a mixture, further Formulation for a hybrid adhesive composition with at least one further component comprising an isocyanate-based adhesive. The formulation for a hybrid adhesive composition according to claim 1 , wherein the polyol is a polyalkylene glycol, a glycerol oligomer or an oligo or polysaccharide. The polyol has the general formula (I):
R ₃ O — [(CHR ₁ ) _X —O] _n —R ₂ (I) wherein R ₁ is independently H, OH, OR ₄ or C (O) —R _{5 at} each occurrence. Selected from
R ₄ is independently selected at each occurrence from hydrogen or a C ₁ -C ₆ alkyl group;
R ₅ is independently selected at each occurrence from hydrogen, OH, OR ₄ or N (R ₄ ) ₂ ;
R ₂ and R ₃ are, independently of one another, selected from hydrogen or a hydrocarbon that may contain heteroatoms;
x is an integer from 1 to 10 independently at each occurrence;
The formulation for a hybrid adhesive composition according to claim 1 , wherein n is an integer from 1 to 30). The formulation for a hybrid adhesive composition according to claim 1 , wherein the polyol is polyethylene glycol or polypropylene glycol having an average molecular weight of 62-4000. Formulation for a hybrid adhesive composition according to any of claims 1 to 4 , wherein the amount of polyol is in the range of 0.1 to 20 wt% based on the amino resin. The blend for a hybrid adhesive composition according to any one of claims 1 to 5 , wherein the amino resin is a urea resin. The urea resin, urea - formaldehyde resin, melamine - urea - formaldehyde resin, melamine - urea - phenol - formaldehyde resins, protein - phenol resins, polyacrylates, polymerization acrylate formaldehyde-free resin or a mixture thereof according to claim 6 A formulation for the hybrid adhesive composition described in 1. It consists of a first component containing at least one amino resin mixed with at least one polyol according to any one of claims 1 to 7 , and a second component that is an isocyanate-based adhesive. Formulation for a hybrid adhesive composition according to any of claims 1-7 . Before hearing isocyanate is hexamethylene diisocyanate, m- and p- phenylene diisocyanate, tolylene-2,4 and tolylene-2,6-diisocyanate, 2,4 ', 2,2' and 4,4 'isomers Forms of diphenylmethane diisocyanate and mixtures thereof, mixtures of diphenylmethane diisocyanate and oligomers thereof, chlorophenylene-2,4-diisocyanate, naphthylene-1,5-diisocyanate, diphenylene-4,4′-diisocyanate, 4,4′-diisocyanate -3,3'-dimethylphenyl, 3-methyldiphenylmethane-4,4'-diisocyanate, diphenyl ether diisocyanate, cyclohexane-2,4- and 2,3-diisocyanate, 1-methylcyclohexyl-2, 4- and 2,6-diisocyanate, bis (isocyanatocyclohexyl) methane, 2,4,6-triisocyanato toluene, 2,4,4-diisocyanato diphenyl ether, isophorone diisocyanate, butylene diisocyanate, trimethylhexamethylene diisocyanate, The hybrid according to any one of claims 1 to 8, which is selected from the group consisting of isocyanatomethyl-1,8-octane diisocyanate, tetramethylxylene diisocyanate, 1,4-cyclohexane diisocyanate, toluene diisocyanate, and mixtures thereof. Formulation for an adhesive composition. The formulation for a hybrid adhesive composition according to any of claims 1 to 9 , wherein the amount of amino resin is at least 30% by weight, with the total formulation being 100% by weight. Before hearing isocyanate is the total formulation as 100% by weight, is present in an amount of at least 0.5 wt%, the formulation for the hybrid adhesive composition according to any one of claims 1 to 10. Before hearing isocyanate is the total formulation as 100% by weight, is present in an amount of at least 1 wt%, the formulation for the hybrid adhesive composition of claim 11. Formulation according to any of claims 1 to 12 , obtainable by mixing a component according to any of claims 1 to 7 with the further component according to claim 1 or 9 . A hybrid adhesive composition comprising: Use of a formulation or hybrid adhesive composition according to any of claims 1 to 13 for the production of wood based materials. Use according to claim 14 , wherein the wood based material is an OSB board, a fiber board or a chip board. Use of the polyol according to any one of claims 1 to 5 in a hybrid adhesive composition, which improves the miscibility of an amino resin with the isocyanate adhesive subsequently added to the hybrid adhesive composition In order to do this, the polyol is mixed with an amino resin in the first step. A method for producing a wood-based material from a lignocellulosic ground material,
a) contacting the lignocellulosic ground product with the formulation for a hybrid adhesive composition according to any one of claims 1 to 12 or the hybrid adhesive composition according to claim 13 ;
b) A method comprising pressing the mixture from a) with heat treatment. The method according to claim 17, wherein the wood-based material is an OSB board, a wood fiber board or a chip board. A component of the blend or the hybrid adhesive composition comprising a mixture of an amino resin and a polyol as a first composition and an isocyanate-based adhesive as a second composition, in step a) The method according to claim 17 or 18 , characterized by metering into a lignocellulosic ground product. 20. The method of claim 19 , wherein the hybrid adhesive composition is applied by means of a blow line, a mixer or a coil. A wood-based material comprising the hybrid adhesive composition according to claim 13 and / or obtainable by the method according to any of claims 17-19 . The wood-based material according to claim 21 , which is in the form of a fiber board or an OSB board. The wood-based material according to claim 22 , wherein the fiberboard is in the form of HDF or MDF. A hybrid adhesive composition comprising an amino resin that is a condensation product of an aldehyde with a compound from the group of urea, melamine, benzoguanamine, glycoluril, acetoguanamine, biuret or mixtures thereof, and a second isocyanate-based adhesive a method of manufacturing an object, an amino resin is mixed with a polyol according to any one of claims 1-5, obtained the amino resin / polyol mixture, the second isocyanate-based adhesive And subsequent mixing. In the first step, the amino resin according to claim 1 is mixed with the polyol according to any of claims 1 to 5 , and subsequently the mixture of amino resin and polyol is changed to claim 1 and 25. The method of claim 24 , wherein the hybrid adhesive composition is made from a mixture comprising an amino resin and a polyol and an isocyanate mixed with the isocyanate of any one of claims 11.